Volume 37 Issue 8
Sep 2022
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CUI Panwang,TONG Fan,FENG Heying,et al.Influence of rear rotor diameter on aerodynamic and acoustic characteristics of counter⁃rotating proeller[J].Journal of Aerospace Power,2022,37(8):1749‑1760. doi: 10.13224/j.cnki.jasp.20220179
Citation: CUI Panwang,TONG Fan,FENG Heying,et al.Influence of rear rotor diameter on aerodynamic and acoustic characteristics of counter⁃rotating proeller[J].Journal of Aerospace Power,2022,37(8):1749‑1760. doi: 10.13224/j.cnki.jasp.20220179

Influence of rear rotor diameter on aerodynamic and acoustic characteristics of counter⁃rotating proeller

doi: 10.13224/j.cnki.jasp.20220179
  • Received Date: 31 Mar 2022
    Available Online: 06 Sep 2022
  • Issue Publish Date: 28 Aug 2022
  • Based on the nonlinear harmonic method and the acoustic analogy model,the influence of different rear rotor diameters on the aerodynamic and acoustic characteristics of the counter⁃rotating propeller was studied.First,the reliability of the numerical calculation method was verified by the wind tunnel test results of a single propeller.Subsequently,six counter⁃rotating propeller models with different rear rotor diameters were studied for a counter⁃rotating propeller.It was found that the clipping of the diameter of the rear rotor of the counter⁃rotating propeller could reduce the pull coefficient and power coefficient of the rear propeller,but the effect on the efficiency was not obvious.As the diameter of the rear rotor decreased,the noise of the front rotor at the blade passing frequency changed little,but the higher order noise changed more.When the diameter of the rear rotor was reduced by 0.25 times of the diameter,the noise of the blade passing frequency of the rear rotor was reduced by about 9 dB.The clipping of the diameter of the rear rotor can not only reduce the noise of the rear rotor,but also reduce the noise of the front rotor to a certain extent.By clipping the blades,the aerodynamic noise of the counter⁃rotating propeller was reduced by 5~6 dB.The reduction of the diameter of the rear rotor weakened the tip vortex interference and wake interference of the counter⁃rotating propeller,and also mitigated the potential flow field interference between the front and rear blades,which in turn reduced the noise radiation of the counter⁃rotating propeller.

     

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